🇳🇱Netherlands @rfbrandsma

I can confirm the issue phjou addresses.

I would also like to report another issue with the patches so far:
The wrapper id for the add more button no longer is unique. In Drupal core the Html::getUniqueId($id_prefix . '-add-more-wrapper'); is used to create a wrapper_id. The patches are using $wrapper_id = Html::cleanCssIdentifier($id_prefix . '-add-wrapper');.

I can confirm the issue phjou addresses.

I would also like to report another issue with the patches so far:
The wrapper id for the add more button no longer is unique. In Drupal core the Html::getUniqueId($id_prefix . '-add-more-wrapper'); is used to create a wrapper_id. The patches are using $wrapper_id = Html::cleanCssIdentifier($id_prefix . '-add-wrapper');.